<template>
  <div v-if="isExternal" :style="styleExternalIcon" class="svg-external-icon svg-icon" />
  <svg v-else :class="svgClass" aria-hidden="true">
    <use :xlink:href="iconName" />
  </svg>
</template>

<script setup lang="ts">
// doc: https://panjiachen.github.io/vue-element-admin-site/feature/component/svg-icon.html#usage
import { isExternal as external } from '@/utils/validate'

const props = defineProps({
  // icon 图标
  iconClass: {
    type: String,
    required: true
  },
  // 图标类名
  className: {
    type: String,
    default: ''
  }
})

// 判断是否为外部图标
const isExternal = computed(() => external(props.iconClass))

// 外部图标样式
const styleExternalIcon = computed(() => ({
  mask: `url(${props.iconClass}) no-repeat 50% 50%`,
  '-webkit-mask': `url(${props.iconClass}) no-repeat 50% 50%`
}))

// 项目内图标
const iconName = computed(() => `#icon-${props.iconClass}`)

const svgClass = computed(()=>props.className?`svg-icon ${props.className}`:'svg-icon')
</script>

<style scoped>
.svg-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}

.svg-external-icon {
  background-color: currentColor;
  mask-size: cover !important;
  display: inline-block;
}
</style>
